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SUMMARY:The 30 GeV Dimuon Excess at ALEPH
DTSTART;VALUE=DATE-TIME:20170601T090000Z
DTEND;VALUE=DATE-TIME:20170601T103000Z
DTSTAMP;VALUE=DATE-TIME:20171214T020743Z
UID:indico-event-14513@indico.in2p3.fr
DESCRIPTION:A two-Higgs-doublet model is proposed to describe the 30 GeV d
imuon excess reported by Heister in his reanalysis of $Z \\to \\bar bb$ ev
ents in ALEPH data taken in 1992-95. The heavier CP-even Higgs $H$ is the
125 GeV Higgs boson discovered at the LHC. The model admits two options fo
r describing the dimuon excess: (1) The lighter CP-even Higgs $h$ and the
CP-odd state $\\eta_A$ are almost degenerate and contribute to the 30 GeV
excess. (2) Only the $h$ is at 30 GeV while $\\eta_A$ and $H$ are degenera
te at 125 GeV. The ALEPH data favor option 1. Testable predictions are pre
sented for LHC as well as LEP experiments. A possible no-go theorem for mo
dels of this type is also discussed.\n\nhttps://indico.in2p3.fr/event/1451
3/
LOCATION:Annecy-le-Vieux Auditorium
URL:https://indico.in2p3.fr/event/14513/
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